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217 lines
7.5 KiB
C++
217 lines
7.5 KiB
C++
//
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// DateTimeFormatter.h
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//
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// Library: Foundation
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// Package: DateTime
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// Module: DateTimeFormatter
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//
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// Definition of the DateTimeFormatter class.
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//
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// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef Foundation_DateTimeFormatter_INCLUDED
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#define Foundation_DateTimeFormatter_INCLUDED
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#include "Poco/DateTime.h"
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#include "Poco/Foundation.h"
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#include "Poco/LocalDateTime.h"
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namespace Poco
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{
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class Timestamp;
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class Timespan;
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class Foundation_API DateTimeFormatter
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/// This class converts dates and times into strings, supporting a
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/// variety of standard and custom formats.
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///
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/// There are two kind of static member functions:
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/// * format* functions return a std::string containing
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/// the formatted value.
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/// * append* functions append the formatted value to
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/// an existing string.
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{
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public:
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enum
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{
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UTC = 0xFFFF /// Special value for timeZoneDifferential denoting UTC.
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};
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static std::string format(const Timestamp & timestamp, const std::string & fmt, int timeZoneDifferential = UTC);
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/// Formats the given timestamp according to the given format.
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/// The format string is used as a template to format the date and
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/// is copied character by character except for the following special characters,
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/// which are replaced by the corresponding value.
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///
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/// * %w - abbreviated weekday (Mon, Tue, ...)
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/// * %W - full weekday (Monday, Tuesday, ...)
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/// * %b - abbreviated month (Jan, Feb, ...)
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/// * %B - full month (January, February, ...)
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/// * %d - zero-padded day of month (01 .. 31)
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/// * %e - day of month (1 .. 31)
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/// * %f - space-padded day of month ( 1 .. 31)
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/// * %m - zero-padded month (01 .. 12)
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/// * %n - month (1 .. 12)
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/// * %o - space-padded month ( 1 .. 12)
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/// * %y - year without century (70)
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/// * %Y - year with century (1970)
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/// * %H - hour (00 .. 23)
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/// * %h - hour (00 .. 12)
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/// * %a - am/pm
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/// * %A - AM/PM
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/// * %M - minute (00 .. 59)
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/// * %S - second (00 .. 59)
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/// * %s - seconds and microseconds (equivalent to %S.%F)
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/// * %i - millisecond (000 .. 999)
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/// * %c - centisecond (0 .. 9)
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/// * %F - fractional seconds/microseconds (000000 - 999999)
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/// * %z - time zone differential in ISO 8601 format (Z or +NN.NN)
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/// * %Z - time zone differential in RFC format (GMT or +NNNN)
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/// * %% - percent sign
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///
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/// Class DateTimeFormat defines format strings for various standard date/time formats.
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static std::string format(const DateTime & dateTime, const std::string & fmt, int timeZoneDifferential = UTC);
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/// Formats the given date and time according to the given format.
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/// See format(const Timestamp&, const std::string&, int) for more information.
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static std::string format(const LocalDateTime & dateTime, const std::string & fmt);
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/// Formats the given local date and time according to the given format.
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/// See format(const Timestamp&, const std::string&, int) for more information.
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static std::string format(const Timespan & timespan, const std::string & fmt = "%dd %H:%M:%S.%i");
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/// Formats the given timespan according to the given format.
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/// The format string is used as a template to format the date and
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/// is copied character by character except for the following special characters,
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/// which are replaced by the corresponding value.
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///
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/// * %d - days
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/// * %H - hours (00 .. 23)
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/// * %h - total hours (0 .. n)
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/// * %M - minutes (00 .. 59)
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/// * %m - total minutes (0 .. n)
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/// * %S - seconds (00 .. 59)
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/// * %s - total seconds (0 .. n)
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/// * %i - milliseconds (000 .. 999)
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/// * %c - centisecond (0 .. 9)
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/// * %F - fractional seconds/microseconds (000000 - 999999)
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/// * %% - percent sign
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static void append(std::string & str, const Timestamp & timestamp, const std::string & fmt, int timeZoneDifferential = UTC);
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/// Formats the given timestamp according to the given format and appends it to str.
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///
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/// See format() for documentation of the formatting string.
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static void append(std::string & str, const DateTime & dateTime, const std::string & fmt, int timeZoneDifferential = UTC);
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/// Formats the given date and time according to the given format and appends it to str.
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///
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/// See format() for documentation of the formatting string.
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static void append(std::string & str, const LocalDateTime & dateTime, const std::string & fmt);
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/// Formats the given local date and time according to the given format and appends it to str.
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///
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/// See format() for documentation of the formatting string.
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static void append(std::string & str, const Timespan & timespan, const std::string & fmt = "%dd %H:%M:%S.%i");
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/// Formats the given timespan according to the given format and appends it to str.
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///
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/// See format() for documentation of the formatting string.
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static std::string tzdISO(int timeZoneDifferential);
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/// Formats the given timezone differential in ISO format.
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/// If timeZoneDifferential is UTC, "Z" is returned,
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/// otherwise, +HH.MM (or -HH.MM) is returned.
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static std::string tzdRFC(int timeZoneDifferential);
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/// Formats the given timezone differential in RFC format.
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/// If timeZoneDifferential is UTC, "GMT" is returned,
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/// otherwise ++HHMM (or -HHMM) is returned.
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static void tzdISO(std::string & str, int timeZoneDifferential);
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/// Formats the given timezone differential in ISO format
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/// and appends it to the given string.
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/// If timeZoneDifferential is UTC, "Z" is returned,
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/// otherwise, +HH.MM (or -HH.MM) is returned.
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static void tzdRFC(std::string & str, int timeZoneDifferential);
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/// Formats the given timezone differential in RFC format
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/// and appends it to the given string.
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/// If timeZoneDifferential is UTC, "GMT" is returned,
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/// otherwise ++HHMM (or -HHMM) is returned.
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};
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//
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// inlines
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//
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inline std::string DateTimeFormatter::format(const Timestamp & timestamp, const std::string & fmt, int timeZoneDifferential)
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{
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DateTime dateTime(timestamp);
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return format(dateTime, fmt, timeZoneDifferential);
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}
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inline std::string DateTimeFormatter::format(const DateTime & dateTime, const std::string & fmt, int timeZoneDifferential)
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{
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std::string result;
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result.reserve(64);
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append(result, dateTime, fmt, timeZoneDifferential);
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return result;
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}
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inline std::string DateTimeFormatter::format(const LocalDateTime & dateTime, const std::string & fmt)
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{
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return format(dateTime._dateTime, fmt, dateTime._tzd);
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}
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inline std::string DateTimeFormatter::format(const Timespan & timespan, const std::string & fmt)
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{
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std::string result;
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result.reserve(32);
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append(result, timespan, fmt);
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return result;
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}
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inline void DateTimeFormatter::append(std::string & str, const Timestamp & timestamp, const std::string & fmt, int timeZoneDifferential)
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{
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DateTime dateTime(timestamp);
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append(str, dateTime, fmt, timeZoneDifferential);
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}
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inline std::string DateTimeFormatter::tzdISO(int timeZoneDifferential)
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{
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std::string result;
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result.reserve(8);
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tzdISO(result, timeZoneDifferential);
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return result;
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}
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inline std::string DateTimeFormatter::tzdRFC(int timeZoneDifferential)
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{
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std::string result;
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result.reserve(8);
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tzdRFC(result, timeZoneDifferential);
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return result;
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}
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} // namespace Poco
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#endif // Foundation_DateTimeFormatter_INCLUDED
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